下列注音正确的一项是( )
A:泾jīng 涘yǐ 渚zhǚ
B:泾jìng 涘sì 渚zhě
C:泾jīng 涘sì 渚zhǚ
D:泾jìng 涘 yǐ 渚zhě
This is a ____(男人).
7x+5x=63.6
x=____